22736394 has 12 divisors (see below), whose sum is σ = 49262226. Its totient is φ = 7578792.

The previous prime is 22736359. The next prime is 22736447. The reversal of 22736394 is 49363722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 974169 = 4665^2 + 987^2 .

It is a super-2 number, since 2×22736394² = 1033887224246472, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 631549 + ... + 631584.

Almost surely, 2^22736394 is an apocalyptic number.

22736394 is an abundant number, since it is smaller than the sum of its proper divisors (26525832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22736394 is a wasteful number, since it uses less digits than its factorization.

22736394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263141 (or 1263138 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 22736394 is about 4768.2694974173. The cubic root of 22736394 is about 283.2960563031.

The spelling of 22736394 in words is "twenty-two million, seven hundred thirty-six thousand, three hundred ninety-four".